The placenta and the umbilical cord
The answer is A) Carbon
Hope this helps.
1. best fit line
2. x axis
3. y axis
4. controlled variables
5. (0,0)
6. y intercept
7. 0.00g
Answer:
i don't know if im right but honestly i could be A B or C
Explanation:
but i would say if its humans adapting to the environment and if an animal probably the same thing but maybe A more than C